I have a 2006 X5 4.4 W/Sport package. The way I know that the chain jumped is that it occurred on the passenger side bank and if you take off the oil cap you can no longer see the chain on the sprocket, so I know that it jumped.

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2006 X5 4.4 Sport Package Grey
2006 M3 Dinan Stage 3 Supercharged Vert Carbon